Improvement in printing-presses



UNITED STATES PATENT OEEICE.

IIENRY EARTH, or CINCINNATI, oIIIo.

IMPROVEMENT IN PRINTING-PRESSES.

Specification forming part of Letters Patent No. 100,002, dated February 22, 1870.

To all whom it may concern.:

Be it known that I, HENRY BARTH, of Cincinnati, Hamilton county, Ohio, have invented a new and useful Roller-Frame for Printing- Presses; and I hereby declare the following to be afull, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification.

The first part of my invention relates to an improved construction and arrangement of the frame of the type-inking rollers of a printing-press, which enables access to and removal of the said rollers in a very convenient manner, as hereinafter described, and which also enables the application of a guard or fender outside said rollers When in their working position, to prevent sheets of paper being caught upon said rollers, which guard or fender constitutes the second part of my invention.

Figure 1 is a perspective view of a portion of a printing-press embodying my improvement, the inking-rollers being retracted. Fig. 2 is a side elevation of the same part, the inking-rollers being advanced and their housing unfolded or turned out.

A represents the bed, and B B the bed- Ways, of a printing-press.

The housings C C' of the inking-rollers D.

D' have open notches c, in which the shafts of the rollers are journaled, so as to permit the easy removal of the rollers when the housing is turned out, in manner to be presently explained.

In the effective position of the housing and rollers, friction-Wheels E upon their shafts rest on and run along the ways B B', to which they are conned by cheeks F F', embracing the said ways and preventing the lateral displacement of the housing'.

In the non-effective or outturned position of the housing, a square end, c', upon the same rests against the said ways, and supports the housing at about right angles to the said ways.

lhe housings C C' are, about their midlength, pivoted at G Gr to the levers H H', which have their fulcra on the ends of arms I I', which extendfrom a shaft, J, by which the apparatus is actuated.

The arms I I' extend beyond the actuatingshaft in the manner represented at K K', and

terminate in eyes L L', receiving rods M M', Whose other ends are pivoted to the ends of the levers H H most distant from the housings.

Helical springs, preferably double, as at N a, Fig. 2, surround the said rods between the eyes L L' and the levers H H', andv act through said levers to press the rollers against the type when in their effective position, as in Fig.

l, and Where turned outward tend to hold the butt-endof the housings against the bed-ways, as in Fig. 2.

The upper ends of the housing-plates are prolonged to hold a rod or bar, P, Which both braces said plates to each other and serves as a handle by which to shift the housing to the position shown in Fig. 2 and back again.

A plate, Q, extending from housing to housing, so as to connect their lower ends, serves as an additional brace, and, in conjunction with the bands R It' R", which are united to and extend transversely from said plate to said bar, constitutes a guard or fender to prevent the contact of the sheets of paper with the rollers, and their being caught up and wound around the latter.

It will be seen that whenever it is desired to inspect or remove a roller, access is by this means afforded to the rear side of the housing without disengaging the springs or boxes; and also that the rollers being removable from the rear side enable the application of the permanent guard or fender P Q R R' R". The parts P Q R` R' It" may be replaced by a single sheath or plate, if desired.

The breaking of a type-inking-roller spring being a very serious inconvenience to the printer, I prefer to provide a pair of springs, N a N- n', at each side of the roller-frame, as

shown in Fig. 2, so that if one breaks the other may remain in force.

In order to get two springs upon one rod I make them of double the pitch that would be required for a single spring, and interthread them in the manner represented. Y

A double advantage is found to arise from this duplex spring-namely, greater liveliness or freedom of motion than a single spring, and incapability of derangement unless both springs should break at once, a contingency not liable vto occur.

I claim heroin as new mld of my uven tion- 3. The provision of L pair of double-threaded l. The iuking-roller housings constructed springs, N u N n', at each sido of the rollerwith open bearings c, und pvoted to levers II f1un1o,1i`o1" the object stated. H', fulorumed upon the operating-arms I I', in In testimony of which iuveutlon I hereunto combination with springs N, for pressing tho sot my hund.

roller-frame toward the form-bed substuu- T r ,m tially as sot forth. 7 HEBRSL BALlH' 2. The guard o11 fonder l Q, R R R, sub- Ttnossosz stuntia'lly as sot forth, mld fort-11o purpose dos- GEO. II. KNIGHT,

iglmtod. l J AMES H. LAYMAN. 

